I do much the same thing, I just have a CD case with a collection of OS's. I find I mostly need XP pro and 32-bit Vista. In relation to the SP's, just get the latest one, that should work shouldn't it?. I also have Windows 7 for myself and a spare XP home edition. It's also handy to have a friend in the IT business, he gives me spare discs that i ask for (obviously not serials) because they get a disc with every serial and dont give the disc to customers.
I havent found a better way. Just lots of discs.
I havent found a better way. Just lots of discs.